Alstom Technology Limited

Stephan Hepner

Richard Blatter

Peter Mueller

When loading a power station in a grid without any energy, this power station must be able to cover all the short-term power requirements, and at the same time to keep the grid frequency within a permissible tolerance band. The invention specifies a method of providing this capability by means of an efficient combination system. According to the invention, the gas turbine () is loaded in a lower power range such that it is controlled in accordance with a predetermined load program, without having to react to load transients in the grid (). Before the power station is connected to the grid, the heat recovery steam generator () is heated up as an energy store, and a steam turbine () is raised at least to its rated rotation speed, with the steam control valves () being highly restricted. The steam turbine reacts in the event of short-term load requirements from the grid, which cannot be covered by the gas turbine.

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Althaeusern, Switzerland

Stephan Hepner